Heavy Sugar

This video from the Royal Society of Chemistry (RSC), aimed at primary teachers, demonstrates an experiment which may be used when learning about densities of liquids or keeping healthy.

A can of diet cola is placed in a container of water alongside a can of non-diet cola and the level at which they float is compared. The diet cola floats closer to the water’s surface than the non-diet coke suggesting that the liquid inside has a lower density. A plastic cup is placed on the top of the diet cola can and sugar is spooned into it until it sinks to the same level as the non-diet coke. The amount of sugar it takes to do this is comparable to the amount listed as being in the non-diet cola.

This demonstration could be carried out in class with children giving possible explanations for what they have observed, suggesting further tests or to give an awareness of the sugar content of cola when learning about the importance of a balanced diet.

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